NCERT - Science

Book: NCERT - Science

Chapter: 12. Electricity

Subject: Physics - Class 10th

Q. No. 8 of Exercise-Pg-221

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When a 12 V battery is connected across an unknown resistor, there is a current of 2.5 mA in the circuit. Find the value of the resistance of the resistor.

In this problem,

The current, I =

Potential difference, V = 12 V

And, Resistance, R=?

And, From Ohm's law:

The value of the resistor is 4800


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